This photo nicely illustrates the way the
small flowers cluster in the leaf axils, as well as the interesting and robust reddish
stems (a variable feature) and pronounced anisophylly -- the leaves are produced
in pairs, but one of the pair becomes so reduced in size (and often eventually
drops off) that the leaves appear to be alternate. Other photos illustrate
the flowers and red-spotted leaves (here and
here) along with the much more prominent
lilac-colored berries (here and
here).

The individual flowers are quite hairy and
produce lots of pollen, as can be seen here.